1. Introduction to Earthquakes
Terms with definitions in red font are suggestions for student note-taking.

2. 25 years of earthquakes: Where do earthquakes occur?
Map of earthquakes worldwide over a 25 year period contained in the noted seismicity catalogs.
Source:
Talking points:
What is the map showing?
How do earthquake locations relate to plate tectonic boundaries?
Are there regions where students are surprised to see lots of earthquakes and did not previously realize were regions of high seismic activity?

3. Map of tectonic plate boundaries
Map of plate boundaries. Compare with previous earthquake map and note that the earthquake locations match up with plate boundaries.
Source:

4. Where do earthquakes tend to occur?
Earthquakes can occur anywhere, but they tend to occur on and near tectonic plate boundaries.
Emphasize that most earthquakes occur on or near tectonic plate boundaries, but that they can happen anywhere.

5. What is seismology?
Seismology: a science that deals with earthquakes and with artificially produced vibrations of Earth
Question for students: What do they think is included in seismology?
Additional talking points:
Seismology is not just the study of earthquakes. It also includes artificially produced motion of Earth (as well as using motion from earthquakes) to learn about the interior of Earth.

6. 1906 San Francisco Earthquake M 7.7 to M7.9?
~300 miles long!
shaking lasted ~1 minute
felt from southern Oregon to central Nevada, and south of Los Angeles (maybe in SD?)
The 1906 San Francisco earthquake ruptured the portion of the San Andreas Fault from south of San Francisco up to the northern end of the fault. This earthquake was widely felt and caused significant damage within the city of San Francisco. For comparison, the M 6.9 Loma Prieta (1989) earthquake is shown in blue. Loma Prieta caused significant damage, including the collapse of the upper part of the Bay Bridge.

7. Massive fires followed the earthquake and burned for several days
1906 San Francisco Earthquake M 7.7 to M7.9?
Massive fires followed the earthquake and burned for several days
Movie footage of the aftermath can be downloaded from the SF Virtual Museum at

8. 1906 San Francisco Earthquake M 7.7 to M7.9?
Casualties and Damage
Casualties
3000+
People left homeless
225,000
Buildings destroyed
28,000

9. 1994 Northridge (Los Angeles), CA M 6.7 Earthquake
Figures are from:
Parking structure at Cal Sate Northridge
Damage to a hospital
Freeway damage

10. 1994 Northridge, CA Earthquake M 6.7
72 people killed
9000 people injured
$20 Billion damage
Damage up to 85 miles away
Severe freeway damage (I-10 and I-5)
Structural damage resulted in 11 closed hospitals
Figures from:

11. 2004 Sumatra Earthquake
M 9.3
230,000 people killed in 11 countries due to ground motion and subsequent tsunami
Tsunami waves up to 30m (100ft) high

12. Coastal damage in Thailand from the tsunami
Photo from:
Coastal damage in Thailand from the tsunami

13. Countries most affected by the earthquake and tsunami
Map from Wikipedia:
Countries most affected by the earthquake and tsunami